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UW part of $25M NSF-funded effort to retrieve Earth s oldest ice core

UW part of $25M NSF-funded effort to retrieve Earth s oldest ice core
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Last Ice Area may be more vulnerable to climate change than thought

The Wandel Sea normally is almost entirely covered by ice that has survived for multiple years and remains thick year-round, even during the summer. But when a German icebreaker called Polarstern was attempting to sail through the area in August 2020, mapping the route with satellite images, the images showed that their path was less obstructed than usual. Researchers say the satellite images found just 50 per cent sea ice concentration in the area on August 14, a record low. Sea ice circulates through the Arctic, it has a particular pattern, and it naturally ends up piling up against Greenland and the northern Canadian coast, Schweiger said. In climate models, when you spin them forward over the coming century, that area has the tendency to have ice survive in the summer the longest.

Last ice-covered parts of summertime Arctic Ocean vulnerable to climate change

Last ice-covered parts of summertime Arctic Ocean vulnerable to climate change IMAGE: The study looked at the Wandel Sea north of Greenland, which is inside what s known as the Last Ice Area of the Arctic Ocean. Image:  Schweiger et al./Communications Earth & Environment In a rapidly changing Arctic, one area might serve as a refuge - a place that could continue to harbor ice-dependent species when conditions in nearby areas become inhospitable. This region north of Greenland and the islands of the Canadian Arctic Archipelago has been termed the Last Ice Area. But research led by the University of Washington suggests that parts of this area are already showing a decline in summer sea ice.

Last ice-covered parts of summertime Arctic Ocean vulnerable to climate change

Last ice-covered parts of summertime Arctic Ocean vulnerable to climate change
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